Improvement in electric annunciators



w. n. COLE.

Electric Annunciators. N0.l55,292 Patented Sept.22,1'874.

UNITED STATES PATENT OFFIcE.

WILLIAM R. COLE, OF DETROIT, MICHIGAN.

IMPROVEMENT lN ELECTRIC ANNUNCIATORS.

Specification forming part of Letters Patent No. 155,292, dated September 22, 1874; application filed May 22, 1874.

To all whom it may concern:

Be it known that I, WILLIAM B. COLE, of Detroit, in the county of Wayne and State of Michigan, have invented an Improvement in Electro-Magnetic Annunciators, of which the following is a specification The'nature of this invention relates to an improvementin that class of electromagnetic annunciators where a tilting number-plate is actuated by an armature attracted to the magnet by the closing of the circuit at a room correspondingly numbered; and it consists in a number-disk eccentrically pivoted in a frame in front of a horizontal magnet, whose armature is provided with a catch to sustain the heaviest edge of said plate in a horizontal position until the circuit is closed, when the armature is drawn away, releasing the plate,

the armature 0, so weighted at the lower end as to cause it to fall away from the magnet a given distance when the circuit is broken and the magnet discharged, 1) being the counterweight referred to. c is a shoulder on the outer face of the armature. D is a disk, numbered on its face, with trunnions d journaled or centered between short standards at the front of the frame A. The back and lower edge is weighted, as at e, to cause the plate to quickly assume a vertical plane when free. Above and behind it a shaft, E, cranked at one end, is j ournaled through the standards,with an arm, j, which, when the crank is turned forward, will turn down the face of the disk to a horizontal position,.hiding the number, when the weighted edge of the disk will push the armature toward the magnet until it passes above the shoulder 0, when the catch upon the armature drops under the disk,- and supports it in the horizontal position. The crank should now be turned back, to throw up the arm.

WVhen the circuit is closed the armature is drawn away from the disk, which at once drops to a vertical position, and shows the number until set as before.

Where a number of annunciators are contained in a case there is one shaft for each horizontal row, and the cranks of the several rows, at their ends, are connected to a single vertical rod, actuated by a single crank or lever, whereby any numbers down are set at once.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The weighted disk D, pivoted in the frame A, in combination with the armature 0, provided with the weight b and shoulder 0, arranged and operating substantially as set forth.

2. The rock-shaft- E, provided with the arm f, and jonrnaled in the frame A, in combination with the weighted number-disk D, as and for the purpose set forth.

WILLIAM It. COLE.

Witnesses H. F. EBERTS, H. S. SPRAGUE. 

